“Lance McCullers has not looked like himself lately.” - It rings true this season, but this is not the first time we’ve heard this.
Throughout his career with the Houston Astros, McCullers has always had some streakiness in him. It’s a function of his play style - he attacks hitters aggressively, which has always yielded high strikeout and walk numbers.
As detailed in a piece by Ben Lindbergh of the Ringer, Lance McCullers makes a living avoiding the strike zone with heavy usage of his curveball, which has in turn made him a lethal strikeout pitcher, but also gets him into trouble.